A kind of power-on switching control system and method of cold backup redundant on-board computer

Abstract

The invention discloses a power-up switching control system of a cold backup redundant satellite-carried computer. The system comprises a complete power-up circuit, a watchdog startup circuit, a power monitoring startup circuit, a port shutdown circuit, an or gate logic circuit, a phase inverter drive circuit and a control relay, wherein the or gate logic circuit and the phase inverter drive circuit are arranged in series corresponding to each single-chip microprocessor respectively; the control relay is arranged at a power input end of a host or a standup machine respectively. The control method comprises the following steps: performing power-up switching management between backup single machines in real time by monitoring the working states of the machines and the power supply situation; monitoring the fault of the working single machines and feeding back by using monitoring of read-write operation of the single machines to finish automatic switching between the host and the standup machine; monitoring the power failure of the working single machines and feeding back through monitoring of single machine power supplies to finish automatic switching between the host and the standup machine; realizing shutdown processing on other single machines after power-up by controlling ports of the power-up single machines to guarantee the working state of cold backup. Active switching is realized, and the reliability is high.

Description

technical field [0001] The invention relates to the technical field of electronic information, in particular to a power-on switching control method of a cold backup redundant on-board computer. Background technique [0002] At present, in order to achieve the design goals of high reliability and long life, on-board computers mostly adopt the redundant design of dual-machine cold backup, in which the two stand-alone computers are respectively named as the main computer and the backup computer, and only one single computer is working at the same time. Between the two, the external direct command controls the pull-in and disconnection of the relay reed to realize the power-on and power-off management of the backup dual machine. When the direct instruction controls the relay to realize the function of power on and off, the control method is as follows: figure 1 shown. Although its control method and dependent control circuit are simple, only relying on direct instructions to r...

AI Technical Summary

Problems solved by technology

Although its control method and dependent control circuit are simple, only relying on direct instructions to realize power-on and power-off switching of redundant backup not only reduces system reliability, but also when the satellite is in an area not controlled by the ground station, the on-board computer does not have Self-governing ability, once a failure occurs, it will affect the normal work of the entire star

For example, if the power-on command of a stand-alone machine is abnormal, the stand-alone machine will not be able to power on and lose the backup function, and cannot ensure the smooth execution of the entire star mission.

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